The first serious heat of spring is heading the way of an Australian capital city, with Perth set for a top of 37°C on Tuesday.

This has been a coolish spring for the six southern capitals, with a notable absence of hot extremes, due to frequent rain events (especially in the five southeastern capitals) and unseasonably active cold fronts sweeping northwards from the Southern Ocean.

• Adelaide has hit 32°C three times this month and topped 30°C just four times in spring. It averages 8.6 days of 30°C or higher in spring.
• Melbourne has not had a 30-degree day this spring. It averages four days of 30°C or higher in spring.
• Sydney has not had a 30-degree day this spring. It averages 4.3 days of 30°C or higher in spring.
• Canberra has not come close to a 30-degree day, with a highest temp of 26.8°C on November 12. It averages 2.8 days of 30°C or higher in spring.
• Hobart reached a seasonal high of 28.1°C on November 10. It averages 0.8 days of 30°C or higher in spring.

Leave it to Perth to deliver some searing capital city heat, although the WA capital has seen just three days above 30°C to date this spring, with a hottest day of 34.8°C on November 22. It averages 10.1°C days of 30°C or higher in spring.

Image: 850 hPa temperatures on Wed 30th 5pm WST. Source: ECMWF.

As Weatherzone meteorologist Angus Konta told us this weekend, a heat trough will drag hot air from the interior of WA into the west of the state. Temps are already ramping up in the midwest of the state this Monday, while southwestern districts, including Perth, will cop it on Tuesday with a top of 37°C, as mentioned.

Wednesday will also be a warm one for Perth, with a top of 35°C before max temps drop to the mid-to-high-twenties from Thursday through till Saturday.